Respuesta :

Answer:

21

Step-by-step explanation:

Answer:

The steps aren’t listed but below are my steps

Step-by-step explanation:

1/3(x+9)=8

1/3x+3=8

1/3x=5

x=15

check answer by subbing for x in original equation

1/3(15+9)=8

5 + 3 = 8

8=8

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